[NTG-context] Lua related change in LuaMetaTeX?

Hi, starting with LuaMetaTeX 2.07.01, a C library I load from Lua started to segfault and valgrind indicates that it accesses invalid memory in multiple places in the middle of Lua internal functions?! The whole thing looks almost like the Lua versions in LuaMetaTeX and in the library are incompatible, but both seem to use 5.4.0. So I asked myself if there might be changes not reflected by the version number. tl;dr: Has the embedded Lua interpreter changed in some non ABI-compatible way in LuaMetaTeX 2.07.01? (Especially on Linux, x86-64. I didn't test other platforms yet) Best regards, Marcel